Description
Foxboro B0123HD
Technical Specifications
- Product Type: Miniature Circuit Breaker / Fuse.
- Current Rating: Specific to the protected circuit (e.g., 2A, 4A, 10A).
- Voltage Rating: 24VDC or 250VAC.
- Trip Characteristic: Fast-acting or time-delay based on application.
Functional Features
- Precise Protection: Trips at exact current thresholds to protect sensitive electronics.
- Resettable: Can be manually reset after a fault is cleared, reducing downtime.
- Visual Indication: Features a visible trip indicator for easy fault identification.
- Compact Size: Designed to fit in standard DIN rail or panel mount configurations.
Application Scenarios
Installed in control cabinets to protect individual I/O modules, power supplies, and field instrument loops from overcurrent conditions and short circuits.
Performance Parameters
- Breaking Capacity: Sufficient to safely interrupt fault currents.
- Trip Time: Fast response to prevent damage to downstream equipment.
- Mechanical Life: High cycle life for repeated tripping and resetting.
Material Composition
Housing is made of high-temperature, flame-retardant thermoplastic. Internal contacts are silver-alloy for low resistance and arc suppression.
Structural Characteristics
Compact, modular design with a toggle or push-button reset mechanism. Features clear markings for current rating and trip status. Designed for easy DIN rail mounting.
Working Principle
Contains a bimetallic strip or electromagnetic coil that responds to excessive current. When the current exceeds the rated threshold, the mechanism trips, physically opening the circuit and stopping current flow.
Installation Requirements
Mount on a standard DIN rail or in a designated panel cutout. Connect using appropriately sized wire. Ensure the breaker is rated for the specific circuit it is protecting.
Usage Precautions
- Never replace a breaker with one of a higher current rating.
- Investigate the root cause of a trip before resetting.
- Test the breaker periodically to ensure proper operation.
